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Citation: LIAO Jin-Sheng, SU Zhen-Yu, ZHOU Dan, LIU Shao-Hua, WEN He-Rui. Hydrothermal Method and Luminescent Properties of Ca0.8-2x(YbxTb0.1Na0.1+x)2xWO4 Near-Infrared Downconversion Phosphor[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(11): 2351-2356. doi: 10.3969/j.issn.1001-4861.2013.00.349 shu

Hydrothermal Method and Luminescent Properties of Ca0.8-2x(YbxTb0.1Na0.1+x)2xWO4 Near-Infrared Downconversion Phosphor

  • 1.

    School of metallurgy and Chemistry Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China

  • Received Date: 26 March 2013
    Available Online: 10 May 2013

    Fund Project: 国家自然科学基金(No.51162012,21161008) (No.51162012,21161008)江西省教育厅基金(GJJ12327)资助项目。 (GJJ12327)

  • An efficient near-infrared (NIR) quantum cutting in Ca0.8-2x(YbxTb0.1Na0.1+x)2xWO4(x=0~20%) phosphors has been demonstrated, which involves the emission of two low-energy NIR photons (around 980 nm) from an absorbed ultra-violet photon via the two cooperative energy transfer processes both from (direct) the WO42- group to Yb3+ ions and (indirect) the WO42- group to Tb3+ to Yb3+ ions. The dependence of Yb3+ doping concentration on the visible and NIR emissions, decay lifetime, and quantum efficiencies have been investigated in detail. Yb3+ concentration dependent quantum efficiency has been calculated and the maximum quantum efficiency approaches up to 135.7%. The development of the near-infrared quantum cutting tungstates could open a route in achieving high efficiency silicon-based solar cells by means of downconversion in ultra-violet part of the solar spectrum to about 1000 nm photons with a two fold increase in the photon number.
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